Twisting device



Feb. 22, 1927.- 1,618,519

0. G. J. 5. DE ROYSANCOUR TWISTING DEVICE Filed March. 11, 1926 Inueniar.

sion of the tension rollers, twisting claims. Y

Patented Feb. 22,1927.

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' Application filed March 11, 1926, .Serial No. 98,924; and in Germany March 4, 1925.

It has already been suggested in continuous spinning frames such as flyer spinning frames, cap and rings inning frames, mount between the spin le and the delivery devices comprising a.- revolving member -(a -roller for instance, around. which the yarn'takes one ormore turns)- which rotates not only around its longitudinal axis but also in a plane which is normal to the yarn which is conducted to the spindle.

' In all these devices this roller eitherfreely rotates or is rotated around its longitudinal axis at a given speed by'means of a suitable gearing. Neither these devices, nor the other twistingdevices which are generally used in continuous spinning .frames prevent the transmission of the tension. which is necessary for the winding of'the yarnon the bobbin, to that part of'the yarn which is not yet completely twisted. As a consequence the yarn breaks frequently, resulting from the great tension to which the roving is subjected and'which is necessary for. the winding of the twisted'yarn on the spindle or on the bobbin which is mounted on it. The .use of rollers whichare positively driven only allow a regulation of the drawing out and of the twisting and do not avoid the bad consequences resulting, from the transmiswinding tothat part of the roving which is submitted to the twisting operation.

My invention has for its object to avoid this disadvantage. Another object also is to secure. simple and practical means for the control of the tension to which the roving -may be subjected without inconvenience.

' With these objects in view my invention consists in the special arrangements and combinations of parts hereinafter fully described and pointed out in the appended Referring to theannexed drawings, which show as an example the embodiments of my I '1 twisting device'inits simplest twisting inventiom' r Fig. 1 is a vertical sectional view of the form.

and 3' show the combination of the device with a braking mechanism the action of which can be adjusted atwill. On the drawing: I The twisting device comprises as usual Figs. 2

2 a rail of the frame.

spindle 9 towhich the yarn,

these breakages devices in which it is. madewhich is necessary for the .of a new twisted tween the delivery rollers 8 This tube 1 which is a band 4 adapted to ass on a pulley or to wharve 5, which is bo ily connected to-the path of the roving 'between the delivery rollers 8 of the spinning frame and the spin dle 9 which is rotated by the pulley 10 in the supporting rail 11. "The roving 12, from the delivery rollers roller. 6 around which it takes one or more turns 13 and is then conducted in passing through an eyelet or thread guide 14 to the is conductedby rotated by means of 8 is conducted on the a. suitable guide for instance by an eyelet 15 arranged at the lower end of the cap which is-bodily connected to the tube .1 in order to rotate with it.

The twisting device j as follows: I

The tube 1 is rotated by means of the band 4 for instance in the direction shown by the arrow-17,-. so that the roller 6 which 1s rotated in the horizontal plane normal to the net described works roving 12 causes the said roving 12 to be.

twisted in the partcomprised between the turns 13 and the delivery rollers 8. Simul taneously'the s indle'9, which-is rotated at a suitable spec winds u the part 18 of the yarn which is comprise between the turns 13 and the thread guide 15. of the yarn on the spindle or on the bobbin mounted on the said spindle causes the roller 6, to be rotated around its longitudinal axis in the direction shown by the arrow 19, si-

multaneously the turns 13 are unwound from the roller 6, in proportion to the winding up part.

If a device of this kind is considered from the I oint of view of the transmission of the win ing up tension which must be support-- ed by the yarn in order to be wound on the spindle 9 it is easily seen that in order to transmission to the part of the roving which is submitted to the twisting operation beand the roller 6,

the tension S supported by the yarn between the roller 6 and the spindle 9 must be greater than the tension S supported by the roving 12 between the delivery rollers 8 and the roller. 6. This condition can.only "be secured when a force K=S -S is acting on the yarn'in an inverted direction to the di- The winding avoid the injurious consequences of this rection in which the yarn is moving. Ittr v is the radius of the twisting roller 6 and M In other words, if the tensi on S must be greater than the tension S 1t 1s necessary to exert on the roller 6 a ne ative momentum g Eequ'atiom ally by the choice of a suitable speed of because with a positive momentum I 2) S would be ter than S, S S The said negative momentum isobtamed according to the resent invention. b means of a suitable bra ing action exerte on the rotation of the roller 6 around its longitudinal axis in order to release the part 12 of the roving comprised between the de- V livery rollers 8 and the roller 6 from the the roller 6 around its tension S, which is necessar for the winding of the thread on the spin lo and to WhlCh the yarn 18 is submitted between the roller 6 and the spindle 9.

In the example sho'wn in Fig. 1 the braking action is secured by friction surfaces 20 which are adapted to press upon the ends of the roller 6 and which are fixed to a spring 21-22 forming a strap above the tube 1. This spring 2122 is held by the friction surfaces 20 engaged in the bearings 7 of the roller 6; it is provided with an opening 23 through which the roving 12 passes. I

In these conditions the more the roller 6 is braked in its motion around its longitudinal axis, the greater is the tension in the part 18 of the yarn comprised between the roller 6 and the point of winding on the bobbin and this tension cannot be transmitted to the part 12 of the roving between the delivery rollers and the roller 6.

If desired the brakingpf the rotation of axis can be adjusted at will. In the example of Fig. 2 the in tensity of the braking can be adjusted by the displacement in a supplementary rail 24 of a screwed ring 25 adapted to exert a variable pressure against the end of t e roller 6 which is provided for this object, with a friction ring 26. The intensity of the braking can be modified in this case at will by the variation of the pressure of the ruig 25 against the ring 26.

n the example shown'in Fig. 3, the same efl'ect is obtained whilst maintaining constant pressure on the roller 6 by means of a ring 27 which is supported by a ballbearing 28 on the supporting .rail 24. In this arrangement, the tube .1 when it is rotat ed by the pulley 5 carries with it the twisting roller 6 the ends of which resting u on the ring 27, tend to cause the guide 30 and loaded with a variable weight 31 the rotation of the roller 6 will be braked also by the increased resistance which will be opposed to the rotation of the cord roller when causing the rotation of the ring 27. This latter arrangement has the advantage of reducing to' a minimum the wear and tear of the end of the roller 6 through which this latter causes the ring 27 to be rotated.

The device just described allows as usurbtation for the tube 1 to vary the amount of twist in the yarn and by adjusting the resistance opposed to the rotation. of the roller 6 around its'axis, tovary the tension in this part of the roving.

What I claim is:

1. In a twisting device for continuous spinning frames, in combination, atubular supporting member, means for rotating said member, a revolving spindle member mounted with its axis transverse to the axis of said supporting member and adapted to have.

turns of yarn about it, and brakin means cooperating with said spindle for a sorbin part of the tension a plied to yarn in sai supporting member, in absence of slippage thereon.

2. In a twistin spinning frames in combination a tube, means whereby this tube is caused to be rotated a revolving member mounted on the "said*tube"'and"around-which the yarn takes one ormore turns,- the said revolvin member bein rotated around its longitudinal axis and m a plane normal to the yarn pass-J ing around the revolving member, means whereby the rotation of the "said revolving member around itslongitudinal axis can be braked means for applying a tension on the yarn, which tension is partially absorbed by said friction device without shppage of the yarn on said revolvin member.

3. In a twisting evice for continuous spinning frames 1n combination, a tube, means whereb this tube is caused to be rotated, a revo ving member mounted on the said tube and around which the yarn takes one or more turns, the said revolving mem-' her being rotated around its longitudinal axis and 1n a plane normal to the yarn passing around the revolving member and friction' members pressing against the revolving member whereby the rotation of the revolv- {)ng member around its longitudinal axis is raked.

4. In a twisting device for continuous spinning frames in combination a tubular supporting member, means whereby the said supporting member is caused to be rotated,

device I for continuous porting member and around which the yarn takes one or more turns, the said revolving member being rotated around its longitudinal axis and in a plane normal to the yarn passing around the revolving member and means whereby an adjustable braking action is exerted against the revolving member whereby a portion of the tension upon the yarn is absorbed without slippage of the yarn thereon. v

5; In a twisting' device for continuous spinning frames in combination a tube, ballbearings supporting the tube, a rail in which the said ball-bearings and tube are mounted means whereby the said tube is caused to be rotated, a revolving member mounted on the said tube around which the yarn takes one or more turns, the said revolving member being rotated around its longitudinal axis and in a plane normal to the yarn passing around the revolving member, a supplementary rail, a ring screwed in the said supplementary rail, a friction ring mounted on the said revolving member and against which the screwed ring is adapted to exert a variable pressure.

6. In a continuous spinning frame, in combination, a yarn conducted from the delivery roller to a spindle, a tube, a supporting railfor the said tube, means whereby this tube is caused to be rotated in the said supporting rail, a revolving member-mounted on the said tube and around which the yarn takes one or more turns, the said revolving member rotating around its longitudinal axis and in a plane normal to the 'yarn in its path from the delivery rollers 

